<h4>Tool</h4><table border="0"><tr><td valign="top"><b>Name</b></td><td valign="top">Gradient Vector from Polar to Cartesian Coordinates</td></tr><tr><td valign="top"><b>ID</b></td><td valign="top">16</td></tr><tr><td valign="top"><b>Author</b></td><td valign="top">Victor Olaya & Volker Wichmann (c) 2004-2010</td></tr><tr><td valign="top"><b>Specification</b></td><td valign="top">grid</td></tr></table><hr><h4>Description</h4>Converts gradient vector from polar coordinates (direction or aspect angle and length or tangens of slope) to directional components (Cartesian).
The tool supports three conventions on how the angle of direction can be supplied:
(a) mathematical: direction angle is zero in East direction and the angle increases counterclockwise
(b) geographical: direction angle is zero in North direction and the angle increases clockwise
(c) zero direction and orientation are user defined
<hr><h4>Parameters</h4><table border="1" width="100%" valign="top" cellpadding="5" rules="all"><tr><th>Name</th><th>Type</th><th>Identifier</th><th>Description</th><th>Constraints</th></tr>
<tr><th colspan="5">Input</th></tr><tr><td>Direction </td><td>Grid (input)</td><td>DIR</td><td></td><td></td></tr><tr><td>Length </td><td>Grid (input)</td><td>LEN</td><td></td><td></td></tr><tr><th colspan="5">Output</th></tr><tr><td>X Component</td><td>Grid (output)</td><td>DX</td><td></td><td></td></tr><tr><td>Y Component</td><td>Grid (output)</td><td>DY</td><td></td><td></td></tr><tr><th colspan="5">Options</th></tr><tr><td>Polar Angle Units</td><td>Choice</td><td>UNITS</td><td></td><td>Available Choices:
[0] radians
[1] degree
Default: 0</td></tr><tr><td>Polar Coordinate System</td><td>Choice</td><td>SYSTEM</td><td></td><td>Available Choices:
[0] mathematical
[1] geographical
[2] user defined
Default: 1</td></tr><tr><td>User defined Zero Direction</td><td>Floating point</td><td>SYSTEM_ZERO</td><td>given in degree clockwise from North direction</td><td>Minimum: 0.000000
Maximum: 360.000000
Default: 0.000000</td></tr><tr><td>User defined Orientation</td><td>Choice</td><td>SYSTEM_ORIENT</td><td></td><td>Available Choices:
[0] clockwise
[1] counterclockwise
Default: 0</td></tr></table>